Internal-combustion engine



I5 Sheets-Sheet 1 H. `G. SMITH INTERNAL-COMBUSTION ENGINE Filed sept. 1o, 1943 Dec. 4, 1945.

QN r sm! 4, 1945- H. G. SMITH INTERNAL-COMBUSTION ENGINE Filed Sept. 1.0, 1943 3 Sheets-Sheet 2 Det. 4, 1945. H G, SMlTH 2,390,279

INTERNAL- COMBUSTION ENGINE Filed Sept. 10, 1945 3 Sheets-Sheet 3 @www Patented Dec. 4, 1945 INTERNAL-CONIBUS TION ENGINE Harold G. Smith, Chicago, Ill., asslgnor to The Buda Company, Harvey, Ill., a corporation of Illinois Application September 10, 1943, Serial No.'501,772

(Cl. 12S-175) 9 Claims.

My invention relates to internal combustion engines and is more particularly concerned with the cooling system therefor.

In internal combustion engines of the liquid l cooled type, it is usual to provide the internal combustion engines with a water pump for circulating water or other cooling liquid through l thewater jacket of the engine and` a radiator connected therewith. Such water pumps are commonly driven by a belt from a pulley affixed to the forward end of the engine crank shaft and it is convenient to adjust the tension of this belt by adjusting the position of the water pump relative to tive engine crank shaft. In order to do this, however, it has heretofore been necessary to change at least one of the connections between the radiator and the internal combustion engine with any material shift in the position of the water pump.l This is a material disadvantage and an object of my invention is to provide an internal combustion 4engine wherein the position of the water pump may be shifted through a wide range to adjust the tension of the driving belt without modifying in any respect the connections between the internal combustion engine and the radiator.

Another object of my` invention is to provide an internal combustion engine which can be readily adapted for use with radiators of diieren height. A

Another object of my invention is to provide a new and improved water pump assembly.

Other objects and advantages will become apparent as the description proceeds. l

In the drawings:

Fig. 1 is a front elevation of an internal combustion engine embodying my invention;

Fig. 2 is a side elevation of the forward end of an internal combustion engine embodying my invention and showing the manner in which the radiator is attached thereto;

Fig. 3 is an enlarged front view of the water pump assembly;

Fig. 4 is a partial, sectional view taken on the line 4-4 of Fig. 8 and showing a detail of the Water pump casting; Y

Fig. 5 is a front, elevational View of a corner of the head of the internal combustion engine with the water pump assembly removed therefrom and showing the conduit connections leading to the water pump assembly;

Fig. 6 is a side elevation of the forward end of the motor head showing the water inlet which is intended to be connected with the bottom of the radiator;

Fig. 7 is a partial, sectional view of the water pump casting and is taken on the line 1 1 of Fig. 3;

Fig. 8 is an irregular, transverse section taken on the lined-8 of Fig. 1;

Fig. 9 is a sectional view taken on the line 9-9 'of Fig. 8, showing the gasket between the cylinder head and Water pump casting;

Fig. 10 is a sectional view taken on the line lll- I0 of Fig. 9 and showing a detail of this gasket; and

Fig. 11 is a transverse section through the water pump casting taken on the line I l--I l of. Fig. 3.

In the various iigures of the drawings, I have illustrated a conventional, internal combustion engine 20 as having a cylinder block including a cylinder head 22 connected by a hose 24 to the top of a radiator 26 and connected by a second hose 28 to the bottom of the same radiator. A water pump assembly, indicated generally by reference character 30, is mounted at the forward end of the engine and contains pumping means hereinafter described in greater detail for circulating water through the radiator and water jacket of the internal combustion engine. This assembly includes a drive pulley 32 driven by a belt 34 which passes over the pulley 32 and a second pulley 36 mounted on the forward end of the engine crank shaft 38. 'Ihe drive pulley 32 also drives `a fan 40,for vcreating a circulation of air through the radiator 26 in the usual manner.

As best shown in Figs. 6 and 8, the head 22 has a water inlet 42 provided in one side thereof adjacent the forward end of tle head. A pipe elbow 44 is attached to the inlet 42 by a bolt 46 which passes through the elbow and screws into a threaded boss 48 forming an integra-l part of the motor head. A sealing gasket 50 is preferably interposed between the circular wall surrounding the inlet 42 and the adjacent-wall of the elbow 44 to form a sealed connection therebetween. A conventional clamp 52 is provided for attaching the upper end of tle hoseV 28 to the elbow 44 and a similar clamp 54 secures the lower end of the hose 28 to a nipple 56 forming an integral part of the radiator 26.

The water inlet port 42 communicates with an angular passage 58 terminating in an outlet port 60 at the forward end of the motor head. As clearly shown in Fig. 5, this outlet port is of arcuate cross-section and is separated from a similarly shaped inlet port 62 by a partition 64 constituting an integral part of the motor head casting. 4The partition 64.lvas an enlarged central portion 66 provided with a threaded bore 88 for receiving a bolt 18 which serves to attach Ia water pump casting 12 to the forward end of the motor head. The bolt 18 also serves asa pivot about which the casting 12 and water pump assembly of which it forms a part may rotate.

The water pump casting 12 has an inlet passage 14 and an outlet passage 16, both of which communicate with a pumping chamber 18. These passages are traversed by webbing 80 and 82, respectively, (Fig. 11) forming an integral part of the casting 12 and increasing the strength of this casting.` The inlet passage 14 has an arcuate inlet end or port 84 (Fig. 4) and the out- 'let passage 16 has a similarly shaped outlet end or port 86. A gasket 88 isv preferably interposed between the forward end of the motorhead and the water pump casting 12 to seal the fluid connections therebetween. As clearly shown in Figs. 9 and 10. this gasket is preferably formed of metal spiders 80 and 92 having asbestos or other suitable material 84 confined therebetween. The gasket 88 is provided with arcuate openings 36 and 88 separated by a central web |00 and is provided with a stud |02 located in a bore |04 in the motor head to maintain the central web of the gasket in alignment with the web 64 of the motor head.

An impeller |06 is located in the pumping chamber 18 and is attached to a driving shaft |08. The righthand end of the pumping cha-mber is closed by a plate ||0 secured to the casting 12 by bolts ||2. A sealing gasket ||4 is preferably interposed between the plate and casting to prevent leakage therebetween. The plate ||0 carries a bolt ||6 which passes through a slot ||8 of an arm |20 whose lower end is nivotally attached to the motor block by abolt |22. The adjusting bolt ||6 may be moved lengthwise of the slot ||8 to adjust the position of the water pump assembly about its pivot bolt and when the proper adjustment has been secured a nut 24 of the adjusting bolt 8 is tightened to lock the water pump assembly in adjusted position.

The casting 12 has a tubular extension |26 carrying a needle bearing, roller bearing, or other suitable bearing |28 for the shaft |08. A collar |30 is suitably attached to the forward end of this shaft, and the hub of the fan 40 and the hub of the pulley 32 are connected to this collar by suitable bolts |32. The hub of the pulley 32 is p urged against the washer |34 by a spring |40.

Any-water or other liquidwhich should leak past this sealing means can escape tovatmosvphere through an opening |42 and is prevented by a ring |44 from creeping along the shaft |08 and reaching the bearing |28.

The casting 12 is provided with a threaded opening |46 (Fig. 7) normally closed by a screw |48 which may be removed to drain the liquid from the pumping chamber 18. The upper part of the pumping chamber is provided with a Similar opening normally closed by a second screw |80 which may be removed'either to permit the introduction of liquid into the pumping chamber or to permit theescape of air, from this chamber.

When the internal combustion engine is operating, the rotation of the crankshaft 38 drives pulley 82, fan 40,. shaft |08, and impeller |06. The impeller dischargesliquid under centrifugal force from the pumping chamber 18 into the outlet ypassage 18. 'I'his liquid then flows through opening 86-in gasket' 88 into the inlet port 62 in the .forward face of the motor head. From here the liquid flows through the engine water jacket in the usual manner and, after absorbing heat, passes to the top of the radiator through hose-24. At the same time, water from thebot tom of the radiator is drawn through hose 20,

elbow 44, angular conduit 88 in the forward corthe attaching bolt 10.

ner of the motor head, opening 88 in the gasket 88, and inlet passage 14 in casting 12 into the pumping chamber 18. This circulation ofthe cooling water or other fluid carries away heat from the engine to prevent overheating thereof and the heat absorbed by the cooling liquid is transferred to air flowing through the radiator as a result of the operation of the fan 40.

After the engine has been in use for a matter of several weeks or months, the belt 34 may stretch sufllciently to require tightening. v,This can readily be accomplished by merely loosening nut |24 and moving bolt ||6 upwardly in slot ||8, thereby causing the casting 12 and pump assembly, of which it forms a part, to pivot about Thereafter nut |24 is tightened to hold the water pump assembly in adjusted position.V

The web |52 (Fig. 4) which separates the ar.. cuate inlet and outlet ports 84 and 86, respectively, of the casting 12 `is broader than the web |00 of the gasket 88 to permit a relatively large angular movement of the casting about its pivot 10 without disturbing the communication between the inlet and outlet ports with the corresponding openings in the gasket 88. In other words, it is important that each of the passages in the lcasting 12 be in registry with only one of the openings in the gasket 68 to prevent bypassing of the liquid. The openings in the gasket 88 register exactly with the corresponding ports in the motor head and this registry is maintained by the gasket pin |02 which prevents rotation of the gasket relative to the motor head.

The foregoing adjustment of the water pump assembly to take up slack in the belt 34 has no effect whatsoever on the hose connections between the top and bottom of the radiator and the motor head. This is of great importance, as any adjustment which appreciably affected the length of these hose connections would require changes in these connections with consequent loss of liquid, unless the entire cooling system were drained before the adjustment was made. Furthermore, no material adjustment of an ordinary hose connection can be made without changing the length oi the hose and such a change would necessarily involve additional expense and additional time and eiort in effecting the adjustment. Furthermore, with applicants invention a further saving is effected because the It is common for a motor manufacturer to supply the same motor for installation in diilerent vehiclesV or other machines utilizingv different heights of radiators. With conventional motor construction, it is necessary to provide difierent water pump housings and constructions with Y engines to be used with diierent heights of radiators in order that the fans will be located opposite the center of the radiator in each installation./Wlth my invention, however, the wide range of adjustment of the water pump assem bly makes it possible to locate the fan in substantially the center of any type of radiator coming within a wideheight range. This results in a material saving to the motor manufacturer and ultimately to the general public.

While I have illustrated and described only a single embodiment of my invention, it is to be understood that my invention is not limited to .the single embodiment shown and described herein, but may assume numerous other forms, and that my invention includes all variations, modifications and equivalents coming within the following claims.

I claim:

1. An internal combustion engine, comprising a block having a Water inlet adapted for connection to the bottom of a radiator, a water outlet adaptedrfor connection to the top of a radiator, a water outlet port communicating with said inlet, a Water inlet port communicating with said outlet by way of the engine water jacket, said ports being arranged concentrically about a common center and each being of arcuate con-4 firmation, a Water pump housing having correspondingly arranged ports, means for attaching said housing to said block for pivotal movement about said center, pumping meansJor circulating water through said ports, water jacket and radiator, a pulley carried by said housing for driving said pumping means, said pulley being eccentrically mounted with respect to said attaching means, and means for securing said housing in various adjusted positions about said attaching means.

2. In apparatus of the class described, the combination of a motor block having a water inlet and a water outlet and water jacketing means in communication with said outlet, said block having a iirst port in communication with said inlet and a second port in communication with said water jacket, a water pump housing communicating with said ports, said housing providing a pumping chamber having an inlet communicating with one of said ports and an outlet communicating with the other` of said ports, an impeller in said pumping chamber, a shaft car-A ried by said housing for driving said impeller, a driving pulley attached to said shaft, means for pivotally attaching said housing to said block, said housing and said ports being constructed and arranged to maintain communication therebetween for various positions of said housing about said pivotal support, and adjustable means connecting said housing and said block for holdingY said housing in fixed position about said pivotal means.

3. A water pump assembly of the class described, comprising a housing having an arcuate inlet port and an arcuate outlet port arranged about a common center, said housing having provision for fastening means passing through said center, a pumping chamber provided by said housing, an inlet passage formed in said housing and connecting one of said ports with said chamber, an outlet passage formed in said housing and connecting the other port with said chamber, an impeller located in said chamber, a shaft for driving said Vimpeller, a single bearing for said shaft carried by said housing, a driving pulley for said shaft, said pulley having a belt receiving portion surrounding the axial center of said bearing, a plate closing one side of said pumping chamber. a supporting arm having a pin and slot connection with said plate, and clamping means for holding said plate in adjusted position relative to said arm.

4. An internal combustion engine, comprising a block having a water inlet adapted for connection to-the bottom of a radiator, a water outlet adapted for connection to the top of a radiator, a water outlet port communicating with said inlet, a water inlet port communicating with said outlet by way of the engine water jacket, said ports being arranged concentrically about a common center, a Water pump housing having correspondingly arranged ports, a bolt for attaching said housing to said block for pivotal movement about said center, pumping means for circulating water through said ports, water jacket and radiator, a pulley carried by said housing for driving said pumping means, said pulley being located at one side of said bolt, and an arm for securing said housing in various pivotal positions about said attaching bolt.-

5. A water pump assembly of the class described, comprising a housing having an arcuate inlet port and an arcuate outlet port arranged about a common center, said housing having provision for fastening means passing through said z center, a pumping chamber provided by said housing, an inlet passage formed in said housing and connecting one of said ports with said chamber, an outlet passage formed in said housing and connecting the other port with said chamber, an impeller located in said chamber, a shaft for drivingsaid impeller, a driving pulley for said shaft. a plate closing one side of said pumping chamber, and a supporting arm having an adjustable connection with said plate.

6. An internal combustion engine, comprising a cylinder head having a water inlet in a side thereof and adapted for connection to the bottom oi' a radiator, a water outlet in an end thereof and adapted for connection to the top of a radiator, a Water outlet port in said end and communicating with said inlet, and a water inlet port in said end and communicating with said outlet opening by way of the engine water jacket, said ports being arranged concentrically about a common center and each being of arcuate confirmation, a water pump housing having correspondingly arranged ports, means for attaching said housing to said block for pivotal movement about said center, pumping means for circulating water through said ports, water jacket and radiator, a pulley carried by said housing for driving said pumping means, said pulley being eccentrically mounted with respect to said attachinf means, and means for securing said housing in various adjusted positions about said attaching means.

'7. A water pump assembly of the class described, comprising a housing having an arcuate inlet port and an arcuate outlet port arranged about a common center, said housing having provision for fastening means passing through said center, a pumping chamber provided by said housing, an inlet passage formed in said housing and connecting one of said ports with said chamber, an o utlet passage formed in said housing and connecting the other` port with said chamber,

an impeller located in said chamber, 'a shaft for:

driving said impeller, a fan attached to said shaft, a driving pulley for said shaft, and a sup' porting means having'an adjustable connection with said housing.

about said attaching. means, said impeller com' municating with said xedinlet and fixed outlet through pairs of registering ports provided by said block and housing, said ports being shaped and arranged to maintain registry throughout a wide range of pivotal movement of said housing,

and means for securing said housing in adjusted:- n

position.

9. In apparatus of .the class described, the combination of a motor block having a water` inlet and a water outlet and water iacketing means in communication with said outlet, said block having a first port in communication with said inlet and a Vsecond port in communication with said water jacket, a gasket iixed against movement relative to said block, said gasket having openings in registry with said ports, a water pump housing communicating with-said ports, said housing providing a pumping chamber having an inlet communicating with one of said ports and an outlet communicating with the other of said ports, an impeller in said pumping chamber, a shaft carried by said housing for driving said impeller, a driving pulleyattached to said shaft, means for pivotally attaching said housing to said block, said housing and gasket.

openings being' constructed and arranged to maintain communication therebetween for various positions ofsaid housing about saidpivotal support, and adjustable means connecting said housing and said block for holding said housing in fixed position aboutsaid pivotal means.

HAROLD G. SMITH. 

